Non-ferrous Flashcards

1
Q

What are the advantages of titanium

A
Strong
Light weigh 
Strength to weight ratio 
Heat resistance 
Corrosion resistance
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2
Q

What are the disvantages of titanium

A

Dust ignites
Need to cut with sharp tools
Colbolt still

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3
Q

What is titanium used for

A

Cooler section of gas turbine engines

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4
Q

Advances of aluminium

A

3 times light than steel
Produced in cast form
Corrosion resistance

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5
Q

Disadvantages of aluminium

A

Course grain structure
Brittle
Too malleable

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6
Q

What is the 1st digit in aluminium alloy

A

Majority alloying element

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7
Q

What is the 2nd digit in aluminium alloy

A

Any modification

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8
Q

What is the last 2 digits in aluminium alloy

A

Any other alloying elements

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9
Q

What alloying element are not heat treatable

A

Copper and zinc

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10
Q

What is 1

A

Aluminium

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11
Q

What is 2

A

Copper

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12
Q

What is 3

A

Manganese

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13
Q

What is 4

A

Silicon

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14
Q

What is number 5

A

Magnesium

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15
Q

What is 6

A

Magnesium and silicon

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16
Q

What is 7

17
Q

What is 8

18
Q

What is work hardening

A

known as strain hardening or cold working, is the strengthening of a metal by plastic deformation
Used for non heat treatable aluminium alloys

19
Q

Annealing

A

procedure for aluminium alloys consists of heating the alloys to an elevated temperature, holding or soaking them at this temperature for a length of time
Then cooled slowly
Leaves in condition for cold working

20
Q

Solution heat treatment

A

heated in either a molten sodium or potassium nitrate bath or in a hot-air furnace. The temperature is then held to within plus or minus 50°C, long enough for the copper to be taken into the solid solution with the aluminium matrix
Metal removed and quenched with 10 seconds

21
Q

Cold working

A

will cause the copper to precipitate at grain boundaries and harden the alloy.

22
Q

Natural age Harding

A

willoccuratroomtemperatureandistheprocess by which the copper precipitates at the grain boundaries, this hardens the aluminium to full strength over a period of several days.

23
Q

Artificial ageing or precipitation hardening

A

temperature is raised to between 1200C and 1900C, depending on alloying element, this increases the precipitation hardening process and also raises the final strength of the alloy

24
Q

What has no quench

25
F
As fabricated
26
I
Annealing
27
H
Strain hardening
28
W
Solution heat treated
29
T
Heat-treated to produce stable tempers other than F, O, or H
30
T3
Solution heat-treated and cold worked.
31
T4
Solution heat-treated and naturally aged
32
T2
Annealed
33
T6
Solution heat-treated and artificially aged.
34
Magnesium properties
Highly susceptible to corrosion Difficult to work with Highly flammable
35
What fire extinguisher to use in magnesium
Dry powder Helium Argon Sand
36
Glare
Glass reinforced laminate thin layers of metal sheet and uni-directional fibre layers embedded in an adhesive system. Glare is an optimised FML for aircraft and consists of alternating layers of aluminium and glass fibre pregreg layers.
37
Advantage of glare
* High strength * Fatigue resistant * Damage tolerant * Impact and blast resistant * Fire resistant * Thermal isolation
38
Where is glare used
Blast resistance cointainer Cargo floors and liners Leading edges